These pumps need a special care because AndoridAPS is using history from the pump but the records in pump don’t have timezone stamp.
That means if you simple change timezone in phone, records will be read with different timezone and will be doubled.
To avoid this do the following steps on every timezone change:

The driver automatically adjusts the time of the pump to the time of the phone.

The Insight also records the history entries in which moment time was changed and from which (old) time to which (new) time. So the correct time can be determined in AAPS despite the time change.

It may cause inaccuracies in the TDDs. But it shouldn’t be a problem.

So the Insight user doesn’t have to worry about timezone changes and time changes. There is one exception to this rule: The Insight pump has a small internal battery to power time etc. while you are changing the “real” battery. If changing battery takes to long this internal battery runs out of energy, the clock is reset and you are asked to enter time and date after inserting a new battery. In this case all entries prior to the battery change are skiped in calculation in AAPS as the correct time cannot be identified properly.

Depending on pump and CGM setup, jumps in time can lead to problems. With the Combo e.g. the pump history gets read again and it would lead to duplicate entries. So please do the adjustment while awake and not during the night.

Switch off automatic time zone in your phone.

Find a time zone that has the target time but doesn’t use DST. For Central European Time (CET) this could be “Brazzaville” (Kongo). Change your phone’s timezone to Kongo.

In AndroidAPS refresh you pump. (hit BT symbol for Dana pumps; “refresh” for the Combo).

Check the Treatments tab... If you see duplicate treatments:

DON’T press “delete future treatments”

Hit “remove” on all future treatments and duplicate ones. This should invalidate the treatments rather than removing them so they will not be considered for IOB anymore.

If the state is unclear - please disable the loop for at least one DIA and Max-Carb-Time - whatever is bigger.

A good time to make this switch would be with low IOB. E.g. an hour before a meal.

This definitely affects the Combo, maybe the Dana Rv2 and RS - and most likely not the Dana R and Insight. But as it is not tested, please be cautions. This is DIY!